I’ve got a TON of covers to upload, but photobucket decided that my ancient $10 per year “pro” account is no longer a thing, and now wants $10 a month. No thanks.
So, despite deleting over a thousand images, I’m still at 110% storage (and lord knows how that even works). So I’ve got to figure out how to use mediafire to post previews, and then use that method I suppose. Stay tuned...
After uploading choose share -> more sharing options -> (choose preview image size, but the one suggested is fine, so I'd leave it as is) -> copy forum embed code -> post it as is.
This results preview image that is clickable and leads to the actual file.
If you want to just give preview image that does not lead to anywhere do the same but delete everything on the link that is outside the IMG tabs.
If youy want to change the preview size afterwards find part of the link that says number + G.jpg (usually 5g.jpg) and change the number between 1 and 7 (1 is miniscule, 7 big).